Chess in a Few Bytes
Linux has a good range of extremely strong chess engines such as Stockfish, Critter, Togo II, Crafty, GNU Chess, and Komodo. The chess engines featured in this article offer no match to a good chess engine, but they show how much can be achieved with a minuscule codebase.

Ghost Commander is a file manager for the Android platform with two panels. If you like using Midnight Commander or GNOME Commander in Linux, Ghost Commander may be a suitable alternative in the Android world.